(19)
(11) EP 0 351 178 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
18.07.1990 Bulletin 1990/29

(43) Date of publication A2:
17.01.1990 Bulletin 1990/03

(21) Application number: 89307014.4

(22) Date of filing: 11.07.1989
(51) International Patent Classification (IPC)5: G11B 23/03, G11B 23/50, G11B 33/14
(84) Designated Contracting States:
DE NL

(30) Priority: 11.07.1988 US 217442

(71) Applicants:
  • MINNESOTA MINING AND MANUFACTURING COMPANY
    St. Paul, Minnesota 55133-3427 (US)
  • SONY CORPORATION
    Tokyo 141 (JP)

(72) Inventor:
  • Leonard, Vurnen J. c/o Minnesota Mining and
    St. Paul Minnesota 55144-1000 (US)

(74) Representative: Baillie, Iain Cameron et al
c/o Ladas & Parry Altheimer Eck 2
80331 München
80331 München (DE)


(56) References cited: : 
   
       


    (54) Disk cartridge


    (57) A generally square disk cartridge (3) for a recording disk (4) includes at least one air filter (10) in a corner (9) of the cartridge (3) and a circular rib (13) adjacent the disk (4) and between the disk (4) and filter (10). The cartridge (3) may also include a radial rib (12) connected to the circular rib (13) to enhance air flow to the filter (10). Air filters (10) may be located in each of the corners (9) of the cartridge (3) with associated circular (13) and radial (12) ribs to induce air flow to each.







    Search report